you can't bleed them the're a sealed unit. replacement one on ebay will set you back about £150
check the slave cylinder to fulcrum linkage on the gear box you may find that it has seized/stiff if so thats what has caused premeture failure of slave cylinder.
Renault want a £800+ to fix it!!! robbing b#$*?~ds if your handy with the tools its an easy job
firestarter
October 2011